Electromagnetic motor



1941- A. w. STEPHENSON 2,251,505

ELECTROMAGNETIC MOTOR Filed Dec. 16, 1940 2 Sheets-Sheet 1 ATTORNEYS 1941. A. w. STEPHENSON 2,251,505

ELECTROMAGNETIC MOTOR Filed Dec. 16, 1940 2 Sheets-Sheet 2 A2502 WlS iepkerasare,

ATTORNEYS Patented Aug. 5, 1941 UNITED STATES PATENT OFFICE ELECTROMAGNETIC MOTOR Albert W. Stephenson, Indianapolis, Ind.

Application December 16, 1940, Serial No. 370,411

3 Claims.

My invention relates to engines, and has among its objects and advantages the provision of an improved magnetic motor.

In the accompanying drawings:

Figure 1 is a side elevational view of the engine with certain parts removed for the purpose of illustration;

Figure 2 is a top plan view;

Figure 3 is a sectional View taken substantially alone the line 3-3 of Figure 1;

Figure 4 is a sectional view along the line 4-4 of Figure 1; and

Figure 5 is a perspective View of one of the rotors.

In the embodiment selected to illustrate my invention, the engine housing I0 is provided with bearings I2 and I4 which rotatably support a shaft I6 to which rotors I8 and are secured. The rotors are preferably of brass and each carries four armatures 22 secured thereto by bolts 24. The armatures 22 are triangular in configuration and the armatures on each rotor have their pointed ends 26 extending in the same direction, but the armatures on the rotor I8 are reversed with respect to the armatures on the rotor 20. Each armature has its two pointed ends 28 extending slightly beyond the ends of its respective rotor.

Housing I0 includes a brass cover section 30 having angular wall portions 32, and the cover 0.

section is secured to the housing section 34 by bolts 36, the housing section 34 being secured to the housing I0 by bolts 38. Upon the wall portion 32 are located electromagnets 40, 42,44 and 46. Electromagnets and 42 act on the rotor I8, while the electromagnets 44 and 46 act on the rotor 20.

Fig. 3 illustrates the specific construction of one each of the electromagnets 40 and 42. Since all the electromagnets are identical in construction, the description of one will apply to all. The core 48 is encased in a brass sleeve 50 and includes a flange 52 bolted to its respective wall portion 32, as at 64. Openings 56 are provided in the wall portion 32 so that the inner ends of the cores 48 may be located in close proximity to their respective armatures 22.

The winding 58 is wrapped about the brass sleeve 50 and to the outer end of the core 48 is secured a fiber plate 60 by means of a bolt 62 threaded into the core. A metallic bar 64 interconnects the cores 48 of the two electromagnets 40, and similar bars also connect the cores in the pairs of electromagnets 42, 44 and 46. The bolt 62 secure the bars 64.

The electromagnets 40 and 42 are circumferentially aligned with respect to the rotor I8 in such manner as to bring the pointed ends 26 of the rotor between the electromagnets of each pair. The electromagnets 44 and 46 are similarly aligned with respect to the armatures of the rotor 20.

In Fig. 2, the battery 66 connects with a wire 60 connected with terminals I0 of the windings on the electromagnets 42 and 46; and the wire 68 has a branch I2 which connects with terminals I4 of the windings of the electromagnets 40 and 44. A wire I6 connects with the other terminal of the battery and the wiper element I8 of a rheostat 80, the rheostat being connected with a lead 82 connected with a switch member 84 arranged to be selectively moved into engagement with conductors 86 and 88. Conductors 86 and are of strap-like resilient material to respectively bear on conductor bands 90 and 92 anchored in a fiber drum 94 fixed to the shaft I6.

The conductors 86 and 88 are mounted on a fiber support 06 secured to the housing of the motor, and a similar fiber support 98 carries four conductor strips I00, I02, I04 and I06. The conductor strips I00 to I06 possess resilient properties so that the two conductors I00 and I02 are pressed against the conductor band 90 and the conductors I04 and I06 against the band 02. To the conductor strip I00 is connected a wire I08 which connects with the second terminals H0 of the windings of the two electromagnets 40. A wire II 2 connects the conductor strip I02 with the second terminals II4 of the windings of the two electromagnets 42.

To the conductor strip I04 is connected 9. wire H6 which connects with the second terminals II8 of the windings of the electromagnets 44. Conductor strip I06 connects with a wire I20 which connects with the second terminals I22 of the windings of the two electromagnets 46. The conductor band 00 is contoured to provide four contact wings I24 aligned with the conductor strip I00 and four wings I26 aligned with the conductor strip I02. Conductor 86 maintains continuous engagement with the conductor band 60. Similarly, the conductor band 92 is con toured to provide four wings I28 and four wings I30 respectively aligned with the conductor strips I64 and I06. Conductor 88 maintains continuous engagement with the conductor band 92. The wings I24 overlap about half their length with the wings I26, and the wings I28 overlap with the wings I30 in the same degree.

With the switch member 84 in engagement with the conductor strip 8%, the two pairs of electromagnets it and are brought into action, with the two pairs of electromagnets Ni and 43 remaining inactive. Accordingly, the two electromagnets (it are simultaneously energized. While the electromagnets 32 are simultaneously energized, the two pairs are energized in such order and at such time intervals as to act on the armatures 22 of the rotor 8 to rotate the rotor in the direction or" the arrow 2'32 in Fig. 3. Ends 26 of the armatures constitute the leading ends of the armatures.

When the switch member is moved into engagement with the conductor 83, the circuit will be efiective on the electromagnets it and 16, these magnets being energized in the same manner as the electromagnets id and 2. Vlith the armatures 22 or" the rotor 23 reversed With respect to their pointed ends 25, the rotor will turn in an opposite direction so as to reverse the motor.

Bearings and it each includes a race l mounted on the shaft to and an outer race 3 between which roller elements E33 are positioned. Against the race iSS is positioned a tapered member M9 having an enlarged openim M2 for accommodating the shaft i6, and the tapered member bears against an angular Wall 55:3. A set screw ['56 is threaded into a casting i553 and bears against the tapered member hit} so that the latter may be adjusted to shift the race to compensate for wear.

I claim:

1. An electromagnetic motor comprising a lotative shaft, a rotor fixed to said shaft, electromagnets, pointed armatures fixed to the rotor and arranged in operative relation with said electromagnets, an electric circuit connected with said electroinagnets, means actuated through rotation of said shaft for periodically energizing the electromagnets in timed relation to said armatures, said electromagnets being grouped in pairs spaced circumferentially of said rotor, and

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the electromagnets in each pair being spaced on opposite sides of the points of the armatures.

2. An electromagnetic motor comprising a rotative shaft, a rotor fixed to said shaft, electromagnets, pointed armatures fixed to the rotor and arranged in operative relation with said electromagnets, an electric circuit connected With said electromagnets, means actuated through rotation of said shaft for periodically energizing the electromagnets in timed relation to said armatures, said electromagncts being grouped in pairs spaced circumierentially of said rotor, the electromagnets in each pair being spaced on opposite sides of the points of the armatures, a second rotor ,fixed to said shaft, pointed armatures fixed to said second rotor With the points of the armatures reversed With respect to said first armatures, and electromagnetic means operatively related to said second rotor and operatively connected into said electric cir cuit.

3. An electromagnetic motor comprising a rotative shaft, a rotor fixed to said shaft, electromagnets, pointed armatures fixed to the rotor and arranged in operative relation with said electromagnets, an electric circuit connected With said electromagnets, means actuated through rotation of said shaf for periodically energizing the electromagnets in timed relation to said armatures, said electromagnets being grouped in pairs spaced circtunferentially of said rotor, the electromagnets in each pair being spaced on opposite sides of the points of the armatures, a s cond rotor fixed to said shaft, pointed armatures fixed to said second rotor with the points of the armatures reversed With respect to said first armatures, electromagnetic means operatively related to said second rotor and operatively connected into said electric circuit, said rotors being formed of brass, and brass sleeves on the cores of said electromagnets.

ALBERT VI. STEPHENSON. 

